722.6 Transmission repair manuals (NAG-1)

722.6 gearbox — information about rebuild

One of the peculiarities of the automatic Mercedes transmission 722.6 is a very high power, so it can work with six or eight cylinder engines, which have less than 6 liters’ volume. It has upgraded solenoids and blocking of the clutch.

Typical problems

Despite the automatic gearbox has many automatic electronical controlling systems, Mercedes 722.6 is a very reliable transmission. But if you get big problems with it, the cost of reparation will be very high. This automatic transmission has requirements for oil – it should be high quality. Producer recommends to change oil every 40 000 kilometers. If the car owner won’t do it, then he will get problems with work. The sign of it is a strong jolt, while shifting gears.

You can get often problems with planetary gear set, which breaks. Then you should repair Mercedes 722.6: take out the automatic transmission and change not working details. Now this problem is cleared, and next modifications of the transmission don’t break so easy. One more problem you can get is a weak spring in the valve body. In this case transmission lubrication starts to work not so well and further it leads to big problem of the automatic transmission.